Furnace used in connection with the making of steel



Fdo., 16 i926. 1,572,912

N.F.EGLER FURNACE USED IN CONNECTION WITH THE MAKING OF STEEL Filed Jan. 20, 1922 2 Sheets-Sheet l Fig; 3

A TTORN E Y.

Feb. 16 1926.

N. F. EGLER FURNACE USED IN CONNECTION WITH THE MAKING OF STEEL Filed Jan. 2o, 15522 2 Sheets-Sheet 2 INVENToR.

ATTORNEY.

Patented Feb. 16, 1926.

UNITED STATES NICKQLAS F. EGLER, OF QHICAGO, ILLINOIS.

FURNACE USED IN CONNGTION WITH THE MAKING F STEEL.

Application 1ed January 20, 1922. Serial No. 530,522.

To all whom t may concern:

Be it known that I, NIcKoLAs F. EGLER, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in FurnacesUsed 1n Connection with the Making of Steel.

More particularly the type of furnace with which my invention is concerned is of 1o the reversing blow torch open hearth type. In these furnaces the inlet port has been centrally located and the auxiliary orou t let ports have been placed to the side or 1n front of the inlet ports through which former, of course,v the fuel is supplied into the hearth. p

In connection with furnaces of this construction, difficulty has been experienced in maintaining the inlet ports repaired because to of the central location of theinlet ports, inasmuch as there is a constant bombardment of the ports by the gases and by the particles carried over by the gases, and inasmuch as these particles have considerable inertia at the time they impinge against the central port.. Also in open hearth furnaces of large capacity a single inlet port concentrates the Zone of maximum heat so that the charge near the inlet end of the furnace is not melted as uniformly as might be desired. @ne objection is that the heat from a centralized port is confined to the center and cuts a channel in front of the port. 'llo avoid this 1 have provided two 3a inlet ports on each end of the furnace about a centrally located outlet port so as to distribute the heat more nerally and uniformiy across the bath. This twin or multiple iniet port arrangement furthermore avoids the bombardment mentioned.

in this twin inlet ort construction it is desirable to direct t e ports towards the central outlet port in the opposite head of the furnace, not only to decrease the cutting eect of the outgoing gases on the inlet port having orifices 16 and 17 through ports. The conditions of combustion not being so sensitive to the condition of the outlet port, the advantage of centrallyloeating the outlet and of disposing the inlet ports about the outlet will be readily appreciated.

Among the objects of my invention are To provide a centrally located port forv use exclusively as an outlet;

To provide combined fuel and on either side of the outlet;

To provide combined fuel and air on one end of the furnace, ward the outlet port at the the furnace; and To provide other detailsof improvement tending to increase the efficiency and serv- `ceabil1ty of a furnace of theV above charcter.

To accomplish the foregoing and other useful ends., my invention comprises means hereinafter more fully set forth and claimed. Referring to the accompanying drawings z- Fig. 1 is a top sectional view, the section being taken along the iine7 1-1,'Fig. 2.

Fig. 2 is a section in elevation taken along the line, 2-2, Fig. 1.

Fig. 3 is a section in elevation taken along the line, 8*-3, JF ig. 1.

Referring to the drawings by characters of reference, 2 and 3 represent the main air and gas inlet fiues respectively, which ex tend transversely across one Vhead of the open hearth furnace. A passage 4 extends upward from the flue 2, and a passage 5 extends upward from the Hue 3, the passages being at one side of the head. Similar passages 10 and 14 extend upwardly from the fines 2 and 3 respectively, at the other side of the head. A port 6, having an outlet orifice 7, extends iongitudinally above the passages l and 5,and a similar port 9 having an outlet orifice 8 extends longitudinally above the passages 10 and 14C. The ports are inclined toward each other at their outlet ends and form open chambers into which the -air and gas from the fines are mixed and then fed into the hearth. The opposite head of the furnace is constructed in a similar manner, the ports which the air and gas mixed therein is fed into the hearth.

air ports ports converging toopposite end of AReferring to Fig. 3, it will be seen that I provide a passageway 11 which extends upwardly from the main air flue 2, intermediate the passages 4 and 10. A `horizontal chamber 13 extends longitudinally above the passageway 11, intermediate the ports 6 and 9, and opens into the heart-h. The chamber is slightly larger in diameter than the end of the passageway which is in open communication therewith, and a valve 12 is provided in the chamber to close the end of the passageway 11. A valve rod extends through the top wall of the furnace, is secured to the valve and can be operated by any well known suitable means. similar passageway and chamber are provided at the opposite head of the furnace, and a valve 18, similar to valve 12, is positioned therewith' and operated in a similar manner. i

When the ports at the right hand side of the furnace arefunctioning to feed fuel into the furnace, the valve 12 is placed in position to yclose the passageway 11 joining the chamber 13, and thevalve 18 is raised, whereby the products of combustion will pass into the chamber 15 and down the passageway thereunder into the main air flue `2, and thence into the air checker. When the left hand side of the furnace'is functioning to feed fuel to the furnace, the valve 18 will close the passageway 11, and the valve, 12 in the opposite headof the furnace is opened, the products of combustion passing into the chamber 13 and down the passageway 11 into the main air flue 2, thence to the air checker. In a similar manner the gases of combustion will also pass into the orifices 7 and 8 through the ports 6 and 9 and down the passageways 5 and 14 into the main gas flue 3, and then to the gas chamber, and also down through the passages 4 and 10, into the flue 2 and then to the air checker. The similar ports and passages function in a similar manner at the opposite side when the fuel is fed from the right hand head.

With respect to the connecting passage between the orifices 7 and 8, and the main gas conduit 3, the construction is similar to the construction shown in Fig. 3 except that there is no passageway corresponding to the passageway 11.

It will be observed that the ports 6 and 9, are arranged at an angle inclined toward each other at their orifices and pointing in substantially the same direction toward the chamber 15; likewise ports 16 and 17 are pointing toward the chamber 13. This arrangement directs the gases from the inlet orifice at one side to the chamber into the orifices at the opposite side for the purpose already described, and concentrates the fiame at a desired point within the furnace. It will be understood, of course,

that the construction of the furnace on either side is a duplication of the opposite s1 e.

Referring to the drawing, it will be observed thfat each inlet port has a longitudinal axis parallel with the general direction of the flow of the gases. It will be seen, therefore, that a vertical plane may be erected containing thelongitudinal axis of b oth outlet chambers and that this vertical plane also contains the longitudinal axis of the furnace. Furthermore, as shown in the drawing, the inlet ports which are disposed about the outlet chambers are preferably disposed converging toward this vertical plane. In other words, the longitudinal axes of the inlet ports in the preferred arrangement, converge toward the said vertical plane. Therefore, rather than have the longitudinal axes of the inlet ports extending parallel to the vertical plane, I have arranged to converge these axes toward the vertical plane with the desired results already described.

Although in the drawing I have shown only a pair of inlet ports in each head, it will be understood that I contemplate using, if necessary, more than two such ports, in other words, I contemplate the use of a plurality of inlet ports disposed about the outlet chambers.

What I claim as my invention is 1. In an open hearth furnace, a pair of converging ports each for supplying both fuel and air, and both connected to supply fuel and air simultaneously in substantially the same direction to the hearth.

2. In an open hearth furnace, a pair of inlet ports at one head of the furnace, each for supplying the bath with fuel and air, and an outlet port in said head located between said ports.

3. In an o en hearth furnace of the reversible type iaving the two opposite heads or vertical walls facing eachother, a horizontal chamber in each head serving as an outlet exclusively, each of said chambers having its longitudinal axis in a vertical plane passing' through the longitudinal axis of the harth. Y

4. In an \open hearth furnace of the reversible type having the two opposite heads or vertical walls facing each other, a chamber in each head serving as an outlet exclusively, each of said chambers having its longitudinal axis in a vertical plane, said plane containing also the longitudinal axis of the hearth, and a fuel chamber on each side of the outlet port.

5. In an open hearth furnace of the rcversible type having the two opposite heads or vertical walls facing each other, a chamber in each head serving as an'outlet exclusively, each of said chambers having its longitudinal axis in a vertical plane, said plane '.tudinal axis horizontally disposed, sald chamber for use as an .outlet exclusively, the longitudinal axis of the chamber andof Ythe hearth located inthe same'vertical plane tov feed mixed air and gas in substantiallythe same direction to the hearth, and inlet ports disposed on either side of said plane.

7. In a furnace, a chamber with its longitudinal axis `horizontally disposed, said chamber providing an outlet exclusively, the

longitudinal axes of the chamber and of the' hearth being located in the same vertical plane, and an intake port located on each side of said plane to feed mixed air and gas in substantially the same direction to the hearth, the longitudinal axes of said intake ports converging toward said plane.

8. In a furnace, 'a chamber for use as an loutlet, exclusively, and an inlet port on either side of a vertical plane through the longitudinal axis of saidoutlet .chamber to feed mixed air and gas in substantially the same direction to the hearth, said inlet ports converging ytoward said plane.

9. In an open hearth furnace, a head having intake ports `and an outlet chamber intermediate the ports, the longitudinal axes of the ports-and .chamber being disposed at yan angle to the vertical axis of said head and in open communication with the hearth, the inlet ports being connected to supply fuel in substantially the same direction to the hearth. p

1 0. In an open hearth furnace of the re-l versible type having two opposite heads facing each other, each of said heads having a I ing each other, each of therein a plurality of horizontally extendingplurality of fuel feeding ports and anoutlet chamber intermediate the ports, and a valve within each chamber, said ports directing fuel from either head into the hearth while the ports and chamber in the opposite head carry ofi' the products of combustion.

11. In an open hearth furnace of the reversible type havin two opposite heads facing each other, eah of said heads having therein a plurality of horizontally extending fuel feeding ports, a horizontally extending out-let chamber intermediate the ports, transversely extending air andgas tlues, and a passageway extending between the air flue and the outlet chamber.

12.. In an open hearth furnace of the reversible type having two opposite heads facing eachother, each of said headsI having therein a plurality of horizontally extending fuel feedin ports, a horizontally extending outlet cham er intermediate the ports, transversely extending air and gas yliues, upwardly extending passages between each port and the lues, a passageway extending between the air flue and the outlet chamber,

and a valve in each outlet chamber to open or close the passageway. n

13. In an open hearth furnace of the reversible type having two opposite heads facsald heads having fuel feeding ports, a horizontally extending outlet chamber intermediate the ports, transversely extending air and gas lues, upwardly extending passages between each port and the ues, and a passageway extending between the air flue and the loutlet chamber intermediate the air passages.

In witness whereof I have hereunto signed my name, this 28th day ofDecember, 1921 NICKOLAS F. EGLER. 

